This range forms the southeastern border of the large Mare Imbriumlunar mare and the northwestern border of the Terra Nivium highland region. It begins just to the west of the prominent crater Eratosthenes, which abuts against the southern face of the range. To the west of these mountains is a narrow gap where Mare Imbrium in the north joins Mare Insularum to the south. Further to the west are the Montes Carpatus mountains.

From Eratosthenes, the mountains form an arcing chain that gradually bends from east to northeast, ending at Promontorium Fresnel at about latitude 29.5° N. Here is another gap where the Mare Imbrium to the west joins the Mare Serenitatis to the east. At the north end of this gap lie the Montes Caucasus.[1]

This range contains several mountains that have received names, listed below ranging from west to northeast:

The last two peaks are perhaps most famous for forming the valley where the Apollo 15 mission made its landing. This landing was considered one of the most scientifically successful missions of the Apollo program and started the last three J-Series missions that included the lunar rover and 3-day stays. Apollo 15 explored smaller peak Mons Hadley Delta (δ) and Rima Hadley rille. This was perhaps the most geologically diverse landing site of the program.[2]

Much of this range forms a sharp, rugged rise at the edge of the Mare Imbrium, with a wide expanse of foothills on the far (southeastern) face. There are, however, some rugged foothills on the northwestern side along the section of the range to the southeast of Archimedes. The total length of the range is about 600 km (370 mi), with some of the peaks rising as high as 5 km (3.1 mi).

Oblique view of the northern Montes Apenninus facing east from 105 km altitude, with Hadley Rille and the Apollo 15 landing site left of center. Mons Hadley, Mons Hadley Delta, and Mons Bradley are visible. The large crater at right edge is Conon.

Oblique view of the southern Montes Apenninus facing east from 115 km altitude, with Eratosthenes in upper right (Apollo 15)